Discovery of a nonpeptidic small molecule antagonist of the human platelet thrombin receptor (PAR-1)
摘要:
The synthesis and biological evaluation of a series of nonpeptidic small molecule antagonists of the human platelet thrombin receptor (PAR-1) are described. Optimization of the 5-amino-3-arylisoxazole lead resulted in an approximate 100-fold increase in potency. The most potent of these compounds (54) inhibits platelet activation with IC50S of 90 nM against the thrombin receptor agonist peptide (TRAP) and 510 nM against thrombin as the agonist. Further, antagonist 54 fully blocks platelet aggregation stimulated by 1 nM thrombin for 10 min. (C) 2002 Published by Elsevier Science Ltd.
Palladium Catalyzed Insertion Reaction of Isocyanides with 3-Arylisoxazol-5(4<i>H</i>)-ones: Synthesis of 4-Aminomethylidene Isoxazolone Derivates
作者:Yi-Ming Zhu、Pei Xu、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.joc.9b01585
日期:2019.9.6
A palladium catalyzed insert reaction of isocyanides to 3-arylisoxazol-5(4H)-ones for the construction of 4-aminomethylidene isoxazolone derivates is reported. In this transformation, only the C–H bond of the methylene group was involved while the remaining ring structure was retained. In general, this work provided a new protocol for the synthesis of 4-aminomethylidene isoxazolones.